Portable bluetooth speaker



FIG. 1 is a front, right side perspective view of a portable bluetooth speaker showing the new design;

FIG. 2 is a back, left side perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom view thereof;

FIG. 9 is an enlarged view thereof with the cover open; and,

FIG. 10 is an enlarged view thereof.

The fade-out portion surrounded by broken lines shown in the FIG. 9 is for the purpose of illustrating portions of the claimed design that forms no part of the claimed design. The broken lines are the boundaries of the disclaimed part and form no part of the claimed design. 

CLAIM The ornamental design for a portable bluetooth speaker, as shown and described. 